path: root/drivers/usb/gadget/rndis.c

/*
 * RNDIS MSG parser
 *
 * Authors:	Benedikt Spranger, Pengutronix
 *		Robert Schwebel, Pengutronix
 *
 *              This program is free software; you can redistribute it and/or
 *              modify it under the terms of the GNU General Public License
 *              version 2, as published by the Free Software Foundation.
 *
 *		This software was originally developed in conformance with
 *		Microsoft's Remote NDIS Specification License Agreement.
 *
 * 03/12/2004 Kai-Uwe Bloem <linux-development@auerswald.de>
 *		Fixed message length bug in init_response
 *
 * 03/25/2004 Kai-Uwe Bloem <linux-development@auerswald.de>
 *		Fixed rndis_rm_hdr length bug.
 *
 * Copyright (C) 2004 by David Brownell
 *		updates to merge with Linux 2.6, better match RNDIS spec
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/proc_fs.h>
#include <linux/slab.h>
#include <linux/seq_file.h>
#include <linux/netdevice.h>

#include <asm/io.h>
#include <asm/byteorder.h>
#include <asm/system.h>
#include <asm/unaligned.h>


#undef	VERBOSE_DEBUG

#include "rndis.h"


/* The driver for your USB chip needs to support ep0 OUT to work with
 * RNDIS, plus all three CDC Ethernet endpoints (interrupt not optional).
 *
 * Windows hosts need an INF file like Documentation/usb/linux.inf
 * and will be happier if you provide the host_addr module parameter.
 */

#if 0
static int rndis_debug = 0;
module_param (rndis_debug, int, 0);
MODULE_PARM_DESC (rndis_debug, "enable debugging");
#else
#define rndis_debug		0
#endif

#define RNDIS_MAX_CONFIGS	1


static rndis_params rndis_per_dev_params [RNDIS_MAX_CONFIGS];

/* Driver Version */
static const __le32 rndis_driver_version = cpu_to_le32 (1);

/* Function Prototypes */
static rndis_resp_t *rndis_add_response (int configNr, u32 length);


/* supported OIDs */
static const u32 oid_supported_list [] =
{
	/* the general stuff */
	OID_GEN_SUPPORTED_LIST,
	OID_GEN_HARDWARE_STATUS,
	OID_GEN_MEDIA_SUPPORTED,
	OID_GEN_MEDIA_IN_USE,
	OID_GEN_MAXIMUM_FRAME_SIZE,
	OID_GEN_LINK_SPEED,
	OID_GEN_TRANSMIT_BLOCK_SIZE,
	OID_GEN_RECEIVE_BLOCK_SIZE,
	OID_GEN_VENDOR_ID,
	OID_GEN_VENDOR_DESCRIPTION,
	OID_GEN_VENDOR_DRIVER_VERSION,
	OID_GEN_CURRENT_PACKET_FILTER,
	OID_GEN_MAXIMUM_TOTAL_SIZE,
	OID_GEN_MEDIA_CONNECT_STATUS,
	OID_GEN_PHYSICAL_MEDIUM,

	/* the statistical stuff */
	OID_GEN_XMIT_OK,
	OID_GEN_RCV_OK,
	OID_GEN_XMIT_ERROR,
	OID_GEN_RCV_ERROR,
	OID_GEN_RCV_NO_BUFFER,
#ifdef	RNDIS_OPTIONAL_STATS
	OID_GEN_DIRECTED_BYTES_XMIT,
	OID_GEN_DIRECTED_FRAMES_XMIT,
	OID_GEN_MULTICAST_BYTES_XMIT,
	OID_GEN_MULTICAST_FRAMES_XMIT,
	OID_GEN_BROADCAST_BYTES_XMIT,
	OID_GEN_BROADCAST_FRAMES_XMIT,
	OID_GEN_DIRECTED_BYTES_RCV,
	OID_GEN_DIRECTED_FRAMES_RCV,
	OID_GEN_MULTICAST_BYTES_RCV,
	OID_GEN_MULTICAST_FRAMES_RCV,
	OID_GEN_BROADCAST_BYTES_RCV,
	OID_GEN_BROADCAST_FRAMES_RCV,
	OID_GEN_RCV_CRC_ERROR,
	OID_GEN_TRANSMIT_QUEUE_LENGTH,
#endif	/* RNDIS_OPTIONAL_STATS */

	/* mandatory 802.3 */
	/* the general stuff */
	OID_802_3_PERMANENT_ADDRESS,
	OID_802_3_CURRENT_ADDRESS,
	OID_802_3_MULTICAST_LIST,
	OID_802_3_MAC_OPTIONS,
	OID_802_3_MAXIMUM_LIST_SIZE,

	/* the statistical stuff */
	OID_802_3_RCV_ERROR_ALIGNMENT,
	OID_802_3_XMIT_ONE_COLLISION,
	OID_802_3_XMIT_MORE_COLLISIONS,
#ifdef	RNDIS_OPTIONAL_STATS
	OID_802_3_XMIT_DEFERRED,
	OID_802_3_XMIT_MAX_COLLISIONS,
	OID_802_3_RCV_OVERRUN,
	OID_802_3_XMIT_UNDERRUN,
	OID_802_3_XMIT_HEARTBEAT_FAILURE,
	OID_802_3_XMIT_TIMES_CRS_LOST,
	OID_802_3_XMIT_LATE_COLLISIONS,
#endif	/* RNDIS_OPTIONAL_STATS */

#ifdef	RNDIS_PM
	/* PM and wakeup are "mandatory" for USB, but the RNDIS specs
	 * don't say what they mean ... and the NDIS specs are often
	 * confusing and/or ambiguous in this context.  (That is, more
	 * so than their specs for the other OIDs.)
	 *
	 * FIXME someone who knows what these should do, please
	 * implement them!
	 */

	/* power management */
	OID_PNP_CAPABILITIES,
	OID_PNP_QUERY_POWER,
	OID_PNP_SET_POWER,

#ifdef	RNDIS_WAKEUP
	/* wake up host */
	OID_PNP_ENABLE_WAKE_UP,
	OID_PNP_ADD_WAKE_UP_PATTERN,
	OID_PNP_REMOVE_WAKE_UP_PATTERN,
#endif	/* RNDIS_WAKEUP */
#endif	/* RNDIS_PM */
};


/* NDIS Functions */
static int
gen_ndis_query_resp (int configNr, u32 OID, u8 *buf, unsigned buf_len,
		rndis_resp_t *r)
{
	int			retval = -ENOTSUPP;
	u32			length = 4;	/* usually */
	__le32			*outbuf;
	int			i, count;
	rndis_query_cmplt_type	*resp;
	struct net_device	*net;
	struct rtnl_link_stats64 temp;
	const struct rtnl_link_stats64 *stats;

	if (!r) return -ENOMEM;
	resp = (rndis_query_cmplt_type *) r->buf;